Comparative allelopathic potential of metabolites of two Alternanthera species against germination and seedling growth of rice

Mehmood, Azhar; Tanveer, Asif; Nadeem,; Zahir, Z. A.

doi:10.1590/s0100-83582014000100001

Cited by 12 publications

(11 citation statements)

References 7 publications

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“…A. philoxeroides has been suggested to be one of the 20 most dangerous invasive alien species in China [6]. The native ecosystem can be irreversibly damaged after invasion, and agricultural production can be greatly affected [7].…”

Section: Introductionmentioning

confidence: 99%

Allelopathic Effects of Aqueous Extracts of Alternanthera philoxeroides on the Growth of Zoysia matrella

Huang¹,

YanYan²,

Wang³

et al. 2017

Pol. J. Environ. Stud.

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Alternanthera philoxeroides is a perennial invasive species worldwide which can greatly affect native ecosystems and agricultural production. Our research studied the allelopathic effects of aqueous extracts of A. philoxeroides on the growth and antioxidant enzyme activities of Zoysia matrella, and isolated and analyzed the dominant allelochemicals in root extracts of A. philoxeroides. The overall allelopathic effects of A. philoxeroides extracts on the growth and antioxidant enzyme activities of Z. matrella were found to be slightly stimulatory (concentrations ≤10 g L -1) and highly inhibitory (≥40 g L -1). Malondialdehyde contents were significantly enhanced with increasing concentrations of A. philoxeroides extracts. The strength of the allelopathic effects of three extracts of A. philoxeroides on Z. matrella followed the order: roots > leaves > stems. The dominant substance was extracted and identified to be ethyl propionate by gas chromatographymass spectrometry (GC-MS). Pot experiment results show that the effects of ethyl propionate on growth and enzyme activities of Z. matrella also ranged from slightly stimulating to highly inhibiting in a similar fashion to the effects of A. philoxeroide extracts on Z. matrella. The overall allelopathic effects of A. philoxeroides on Z. matrella ranged from slightly stimulating to highly inhibiting. The most abundant allelochemical component of root extracts was identified as ethyl propionate, which also exhibited inhibitory effects similar to A. philoxeroides extracts on Z. matrella.

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Section: Introductionmentioning

confidence: 99%

Allelopathic Effects of Aqueous Extracts of Alternanthera philoxeroides on the Growth of Zoysia matrella

Huang¹,

YanYan²,

Wang³

et al. 2017

Pol. J. Environ. Stud.

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“…The seedling exhibiting higher vigor index emerged earlier and had more time for accumulating root and shoot biomass. The increase in root and shoot biomass with increased mean emergence time has been reported by Mehmood et al (2014).…”

mentioning

confidence: 71%

PHENOLICS IN TWO Alternanthera SPECIES RESIDUES AFFECT THE GERMINATION AND EARLY SEEDLING GROWTH OF RICE (Oryza sativa)

et al. 2017

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Alternanthera species are invasive aquatic/semi-aquatic weeds posing a serious threat to agro-biodiversity in several countries in the world. The present study was conducted to assess the phytotoxic effects of Alternanthera philoxeroides and A. sessilis residues on emergence and early seedling growth traits of rice (Oryza sativa). Soil was prepared with 4% (w/w) Alternanthera species residues separately and allowed to decay for 0, 15 and 30 days. Rice emergence was significantly decreased but increase in mean emergence time and time to 50% emergence was observed in soils modified with Alternanthera species residues compared with seed sown in unmodified soils. Rice emergence was reduced to 50-67% and 52-75% by A. sessilis and A. philoxeroides, respectively. A significant reduction in rice root, shoot length, and biomass was also noted with Alternanthera-infested soil. Total phenolics increased with increasing residue decay time in both species thereby showing their direct interaction with emergence and seedling traits of rice. The phenolic compounds identified were namely Quercitin, Chlorogenic acid, P-Coumeric acid, Trans-4-hydroxy3-methoxy, Cinamic acid, Caffeic acid, Syringic acid, Sinapic acid, Vanillic acid, 4-hydroxy-3-methoxy benzoic acid.

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“…Similarly, Jinhu et al (2012) reported that depending upon concentration, the leaf leachates of Eupatorium adenophorum exerted inhibitory as well as promoting allelopathic effects on germination and dry matter accumulation of Amaranthus retroûexus and Chenopodium glaucum seedlings. Similarly, Mehmood et al (2014) found m-coumaric acid, 4-hydroxy-3-methoxybenzoic acid, p-coumaric acid, ferulic acid, chlorogenic acid, vanilic acid and gallic acid in Alternanthera philoxeroides and A. sessilis and revealed their phytotoxicity against germination, seedling growth and biomass production in rice. In present study, there was a differential allelopathic effect of different weeds on germinability and biomass production in wheat seedlings (Tables 1 and 2).…”

Section: Allelopathic Effect Of Water Extracts Of Weeds On Germinabilmentioning

confidence: 88%

Allelopathic Effect of Some Associated Weeds of Wheat on Germinability and Biomass Production of Wheat Seedlings

et al. 2018

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Weeds associated with crops may impose their phytotoxic effects on crop plants through the release of their allelochemicals and hence seriously reduce crop productivity. The present study was conducted to investigate the allelopathic effect of water soluble phenolics of weeds associated with wheat crop (Vicia sativa, Trigonella polycerata, Lathyrus aphaca, Medicago polymorpha, Melilotus indica) on germinability and biomass production of wheat seedlings by using their water extracts at 2.5% (w/v) and 5% (w/v) concentrations and residues of the same weeds with 0, 15 and 30 d decomposition periods at 2% (w/w) concentration. The results showed that the water extracts of M. indica and V. sativa at 5% concentration imposed the most inhibitory effect on energy of germination (81%) and prolonged time to 50% germination (226%), respectively; by contrast, T. polycerata and M. indica extracts at the same concentration inhibited shoot (8%) and root fresh biomass (64%). However, shoot dry biomass was exalted by the weed extracts at both concentrations with maximum increase (29%) caused by the M.indica extract at 2.5% concentration; however, root dry biomass (46%) and root/shoot ratio (51%) were decreased by M. polymorpha and M. indica extracts at 5% concentration, respectively. Residues of L. aphaca and M. polymorpha with a 30 d decomposition period proved the most toxic regarding energy of emergence (85%) and time to 50% emergence (138%), respectively; while, shoot fresh (41%) and dry biomass (26%) production were hindered mostly by M. indica and M. polymorpha residues with a 30 d decomposition period. There was the highest decrease in root fresh (64%) and dry biomass (64%), and root/shoot ratio (64%) when treatment was performed with V. sativa residues without decomposition. The results show that leachates and residues of weeds inhibit wheat germinability and biomass production through release of allelochemicals, and they are a threat to profitable crop production.

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Comparative allelopathic potential of metabolites of two Alternanthera species against germination and seedling growth of rice

Cited by 12 publications

References 7 publications

Allelopathic Effects of Aqueous Extracts of Alternanthera philoxeroides on the Growth of Zoysia matrella

Allelopathic Effects of Aqueous Extracts of Alternanthera philoxeroides on the Growth of Zoysia matrella

PHENOLICS IN TWO Alternanthera SPECIES RESIDUES AFFECT THE GERMINATION AND EARLY SEEDLING GROWTH OF RICE (Oryza sativa)

Allelopathic Effect of Some Associated Weeds of Wheat on Germinability and Biomass Production of Wheat Seedlings

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